Jon440x

just bought a 1992 toyota truck 4cyl std 4x4 with 185000km on it. just noticed today that the motor is louder than i would like it to be. I thought i would ask you guys what you think.

I did a search about how to tell if my timing chain needs to be replaced, did not find anywhere where it says what it sounds like.

My truck at idel makes a weird sound like something is vibrating and it is almost like it comes in three's .....

any ideas ?